42 lines
838 B
C
42 lines
838 B
C
|
#include "stm32f10x.h"
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 微秒级延时
|
|||
|
|
* @param xus 延时时长，范围：0~233015
|
|||
|
|
* @retval 无
|
|||
|
|
*/
|
|||
|
|
void Delay_us(uint32_t xus)
|
|||
|
|
{
|
|||
|
|
SysTick->LOAD = 72 * xus; //设置定时器重装值
|
|||
|
|
SysTick->VAL = 0x00; //清空当前计数值
|
|||
|
|
SysTick->CTRL = 0x00000005; //设置时钟源为HCLK，启动定时器
|
|||
|
|
while(!(SysTick->CTRL & 0x00010000)); //等待计数到0
|
|||
|
|
SysTick->CTRL = 0x00000004; //关闭定时器
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 毫秒级延时
|
|||
|
|
* @param xms 延时时长，范围：0~4294967295
|
|||
|
|
* @retval 无
|
|||
|
|
*/
|
|||
|
|
void Delay_ms(uint32_t xms)
|
|||
|
|
{
|
|||
|
|
while(xms--)
|
|||
|
|
{
|
|||
|
|
Delay_us(1000);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @brief 秒级延时
|
|||
|
|
* @param xs 延时时长，范围：0~4294967295
|
|||
|
|
* @retval 无
|
|||
|
|
*/
|
|||
|
|
void Delay_s(uint32_t xs)
|
|||
|
|
{
|
|||
|
|
while(xs--)
|
|||
|
|
{
|
|||
|
|
Delay_ms(1000);
|
|||
|
|
}
|
|||
|
|
}
|